Defensive publication



DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 O.G. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED JANUARY 13, 1970 T870,014 UNSATURATED POLYESTERS Hugh J. Hagemeyer, Jr., Willard P. Gleason, and Alfred G. Robinson III, all of R0. Box 2068, Longview, Tex. 75603 Filed Dec. 18, 1968, Ser. No. 784,930 Int. Cl. C08g 17/10 US. Cl. 260-75 No Drawing. 12 Pages Specification Unsaturated polyesters having good heat distortion temperatures, flexural strengths, and cure properties are prepared in a two step process comprising (A) preparing a linear polyester by condensing a phthalic acid or esterifiable derivative thereof and a glycol component consisting of ethylene glycol and 2,2-dimethyl-1,3-propanediol, 2,2,4-trirnethyl-1,3-pentanediol, or a mixture thereof and (B) reacting said linear polyester and an unsaturated aliphatic dicarboxylic acid or an esterifiable derivative vthereof to form said unsaturated polyester, 

